Razor blade polishing and stropping machine



Dec. 25, 1934. M. WLOKA RAZOR BLADE POLISHING AND STROPPING MACHINEFiled Oct. 10, 1930 2 Sheets -Sheet l fizbejzimk Dec. 25, 1934. Y M,WL-OKA 1,985,874

RAZOR BLADE POLISHING AND STROPPING MACHINE Filed Oct. 10 1950 2Sheets-Sheet 2 (o MW 7 1 My 1 .fiwenfar;

Patented Dec. 25, 1934 MAORI Max was,

Application October 10, 1930, Serial No. 487,773

In Germany October 18, 1929 1: Claim. (Cl. 51- -84) This inventionrelates to a machine for polishing the cutting edges of double edgedrazor blades, in which two blades lie at the same time juxtaposed on acarriage of the machine with one edge projecting and, during the forwardand return movements of the carriage these blades are guided past thepolishing wheels of the machine, so that the projecting edge of theblades is polished on both sides. y

The machine according to the invention differs from the known machinesof this type in that on a slide reciprocatable transversely over thecarriage of the machine three spring loaded grippers are arranged which,when the carriage is in its initial position, are controlled by a rotarycam drum so that they successively lift the blades to be polished fromthe pile of blades, place the blades on the carriage of the machinefirst with one and then with the other edge projecting therefrom andafter both edges of the blades have been polished, lift the blades oifthe carriage and deposit same on guide pins at the side of the carriage.The blades are thus automatically guided through the machine by means ofthe grippers in such a mannerthat always two blades are on the carriageof the machine and are simultaneously polished on one edge, so that thepolishing of the blades takes place rationally and the polished edges ofthe blades are not damaged.

An embodiment of the invention is illustrated by way of example in theaccompanying drawings in which:

Fig. 1 shows the machine in front elevation. Fig. 2 is a side elevationof Fig. 1. Fig. 3 shows in top plan view the blades in position on thecarriage.

Fig. 4 is a part elevation looking from the right.

of line IV--IV- of Fig. 1. v

On the frame 1 of the machine two mutually adjustable bearing carriages2 and 3 are mounted which each carry two vertically adjustable bearings4, 5 and 6, '7 with axles 8, 9 and 10, 11. The bearings 4, 5 and 6, 7are adjusted vertically by means of two handles arranged on the top ofthe 7 28 engages in the toothed rim 29 on one end of the cam drum 24,which spur wheel is keyed on an axle 32 and driven by a belt drive 25also from the main shaft 20. In a guide 26 the cam drum 27 of themachine is guided which carries a projection 30 engaging in a cam groove31 in the cam drum 24 and thus is reciprocated during the rotation ofthe cam drum 24.; Above the carriage 2'7 a slide 34 is guidedtransversely to-the carriage 27 on a frame 33. An arm 35 oscillatablymounted at 36 is mounted on its upper end on the slide 34, its lower endcarrying a roller37, engaging a projection 48 on the end of the cam drum24 re- 41 of the frame 33 three arms 42, 43, 44 as also a lever 46 arefixed. The lever 46 carrying a roller 47 is situated at the side of thecam drum 24.

The blades to be polished are placed with their outer holes over guidepins 50 on a plate 51 which is arranged on a frame 52 of the slide 27preferably so that it is shifted upwards a distance corresponding to thethickness of a blade, each time a blade is removed from the pile so thatthe uppermost blade is always situated at the same height. This may beeffected by a vertical screw spindle whichis periodically rotated by anysuitable means. For example the plate 51 may be providedwith a: screwspindle with a toothed wheel mounted thereon in which a pawl engageswhich is actuated by the arm 35. In the initial position of the carriage27 the gripper 38 comes above the blades piled up at 50 and the grippers39 and 40 aresituated above the longitudinal edges of the carriage 27.When the carriage 27 is in this position, the projection 48 on the camdrum 24 strikes against the roller 47 of the arm 46, so that thegrippers 38, 39 and 40 are pressed downwards. a

At the same time the grippers 38, 39 and 40 are influenced by suctionwith the result that the v gripper 38 lifts the blade lying uppermost at50 and the grippers 39 and the blades already on the carriage 27 ofwhich one blade is already polished on one edge and the other on bothedges. As soon as the grippers have lifted the blades, the slide 34 isshifted by the arm 35 so that the gripper 38 comes above onelongitudinal edge, the gripper 39 above the oppositelongitudinal edgeand the gripper 40 above the depositing point, that is the guide pins53. At this movement the suction eifect of the grippers 38, 39, 40 isremoved with the result that the blade lifted off the pins at 50 by thegripper 38 drops over the guide cam of one longitudinal edge of thecarriage, the blade already polished on one edge and lifted from thispoint by the gripper 39 drops over the guide calm of the otherlongitudinal edge of the carriage and the blade already polished on bothedges and lifted from this last mentioned point by the gripper 40 dropsover the guide pins nation a laterally reciprocating carriage, two

' blade holders arranged side by side on said carriage, a slide adapted.to transversely slide on said carriage two pairs of rotary tools, onepair on each side of said carriage and adapted to work the two sides ofone edge of each of the blades in said blade holders during thereciprocation of said carriage, three suction grippers mounted on saidslide; and a -cam "drum adapted to jointly control said grippers tosimultaneously shift three blades, each blade being successively takenup from a pile of blades on one side of said carriage placed first ononeand; then on the other of said blade .holders and finally depositedat the other side of said carriage.

' MAX WLOKA.

